honey-flower vs Protea mellifera

honey-flower and Protea mellifera both are nouns.

Word	Noun	Adjective	Verb	Adverb
honey-flower	Yes	No	No	No
Protea mellifera	Yes	No	No	No

As nouns, honey-flower and Protea mellifera are synonyms defined as:

honey-flower and Protea mellifera: Australian shrub whose flowers yield honey copiously

Other synonyms of honey-flower include honeyflower.

honey-flower (noun)	Protea mellifera (noun)
Australian shrub whose flowers yield honey copiously	Australian shrub whose flowers yield honey copiously
erect bushy shrub of eastern Australia having terminal clusters of red flowers yielding much nectar